Question

Fe2O3 + H2O
Na2O +H2O
BaO + SO3
SO2 + KOH
MgO + HNO3
CrO3 +Ba(OH)2

Answer 1

В 1 реакция не идет.
Na2O + H2O = 2NaOH
BaO + SO3 = BaSO4
SO2 + 2KOH = K2SO3 + H2O
P2O5 + 3CaO = Ca3(PO4)2
MgO + 2HNO3 = Mg(NO3)2 + H2O
Fe2O3 + 3H2 = 2Fe + 3H2O
CrO3 + Ba(OH)2 = BaCrO4 + H2O